Display panel or portion thereof with graphical user interface



The sole FIGURE is a front view of a display panel or portion thereof with graphical user interface, showing the new design.

The outermost broken line rectangle illustrates a display panel or portion thereof that forms no part of the claimed design. The remaining broken lines illustrate a mixed reality environment and form no part of the claimed design. 

CLAIM The ornamental design for a display panel or portion thereof with graphical user interface, as shown and described. 